How To Close An Open Relay In Exchange 2007 / 2010

If you have an Exchange 2007 or Exchange 2010 server and you discover that you are an Open Relay, there is a very simple command that you can run from the Exchange Management Shell to close this down.

The command is:

Get-ReceiveConnector “YourReceiveConnectorName” | Remove-ADPermission -User “NT AUTHORITY\ANONYMOUS LOGON” -ExtendedRights “ms-Exch-SMTP-Accept-Any-Recipient”

Replace “YourReceiveConnector” with the name of your Receive Connector and then run the command.

To test if you are an open relay, you can visit MXToolbox or Mailradar.

If you want to check to see if you are allowing “ms-Exch-SMTP-Accept-Any-Recipient” on any Receive Connector for Anonymous Users, run the following command from the Exchange Management Shell:

Get-ReceiveConnector | Get-ADPermission | where {($_.ExtendedRights -like “*SMTP-Accept-Any-Recipient*”)} | where {$_.User -like ‘*anonymous*’} | ft identity,user,extendedrights

08/04/2014 Update – If you still have a problem after modifying your receive connector(s) accordingly, please make sure you or someone else hasn’t installed the SMTP Service on the Exchange Server.  I was emailed about such a problem with an Exchange 2010 server the other day and the having stopped ALL of the Exchange Services the server was STILL an Open Relay.  With a quick NETSTAT command to see what was listening on port 25, I soon discovered the SMTP service was present and enabled.  Having disabled the service and restarting all the Exchange Services, the Open Relay problem disappeared immediately.

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29 Responses

  1. I want to close the open relay. But after closing, pop/imap users cannot send emails from outlook.

    Any solution for this…

  2. Hi and thanks for the great tips….

    I am entering the commands and it is asking me to supply identity values.

    What should I be entering here?

    • Are you entering the name of your Receive Connector in the command correctly?

      Get-ReceiveConnector “YourReceiveConnectorName” | Remove-ADPermission -User “NT AUTHORITY\ANONYMOUS LOGON” -ExtendedRights “ms-Exch-SMTP-Accept-Any-Recipient”

      Exchange won’t be an open relay by default, so are you sure you are an open relay?

  3. I got it to work, not sure why it wasnt before…

    Its strange, because it wanst an open relay before.

    It just became one. Im not sure how. The only way I knew is because Messagelabs (who provide us with our email anti spam and filtering) suddenly informed us that our server was an open relay….

    And after checking myself, saw that they were right.

    Strange….

  4. This is very important… I have two connectors, one for internal usage for outlook/exchange clients, while another is used for the outside network. (“windows sbs internet receive “). If I close the relay as instructed, will the connector still be able to receive mail for the authoritative domains defined elsewhere ?

    • Absolutely. That won’t affect normal mail-flow for your internal domains, it will only stop people being able to send mail to your server destined for other domains not handled by your server.

  5. Hello Alan!

    I followed your guide and successfully migrated the Exchange server:

    Now few domains are not accepting our mails as Under:

    Organization configuration –> Hub Transport–> send connector does not have FQDNS name that matches with my A reocrd, there is no option to change the FQDNS name.

    I tried maxtoolbox and found that it says Warning – Reverse DNS does not match SMTP Banner.

    Please suggest!

    Thanks

    Romi

  6. Hi Alan,

    How are you? When I remove anonymous check from the receive connector to stop the open relay then I am unable to receive emails from hotmail, yahoo or any external domains. I just want to close an open relay but also want to receive emails from external domains to my managed domains. Kindly suggest. Thanks.

    • Hi Muhammad,

      Removing anonymous will stop all inbound email because you need that enabled to allow other mail servers to send to your server. Without anonymous enabled, you would have to create a username and password for every single mail server wanting to send you mail, which would be impossible.

      Are you sure you are an open relay?

      Check on http://www.checkor.com and see what it says, then if you are, read my blog article carefully.

      Alan

  7. Hi Alan,

    I’ve got an Exchange 2010 SP 1 box. Are we supposed to be running this command on our default receive connector which allows other mail servers to send to my server over port 25? I seem to be an open relay over port 25. If I uncheck anonymous users on the default receive connector, my open relay disappears. But then I won’t be able to receive email from the outside. Thanks for any clarification.

    • Yes – you should be running this command against the Default Receive Connector.

      Removing Anonymous will kill mail stone dead, so please make sure that you leave that enabled.

      Anonymous is all that should be enabled on the Permission Groups Tab and TLS is all that should be enabled on the Authentication tab.

      Worst case, you can just delete and re-create the Receive Connector using the same settings as you currently have. To re-enable a relay, you would have to use the Exchange Management Shell to add the permissions, so as long as you don’t put the permissions back, you should be fine.

      Alan

  8. Hi,

    I got Exchange 2007 and set to open relay and all sort of spam issues.
    i hae a user in different country and connect using Pop/SMTP.
    if i close open relay he cannot send email?

    How do i allow him to send/receive with Pop?

    and close Open relay?

    AS

    • Are you setting the user to authenticate when using SMTP / POP3?

      Is your user an internal user working externally? If they are, you should look at Outlook Anywhere and then you don’t need to mess with your RECEIVE Connectors at all as the user will be using HTTPS to send mail.

      Alan

  9. Hi Alan,
    I have an issue with my exchange server.I have edge transport and tmg on the same server.I have created a receive connector for the internet on the edge transport,my issue is that my exchange is being used as open relay.When i ran command to see if its open relay from the Exchange Management Shell it dont give me any answer. Can you advise me please.thanks.

    Mik

  10. Hi Alan,
    I have run the test and it says “All tested completed! Relays accepted by remote host.”. Can you please advise me what need to be done.

    Mik

    • Ouch!

      Please email me the results of:

      get-receiveconnector | fl

      from the Edge Server and the CAS server. Let me know which results relate to which.

      Many thanks

      Alan

      • Hi Alan,
        Please find below result for edge ans CAS server.

        1. edge Server:
        AuthMechanism : Tls, ExchangeServer
        Banner :
        BinaryMimeEnabled : True
        Bindings : {192.168.240.8:587}
        ChunkingEnabled : True
        DefaultDomain :
        DeliveryStatusNotificationEnabled : True
        EightBitMimeEnabled : True
        BareLinefeedRejectionEnabled : False
        DomainSecureEnabled : True
        EnhancedStatusCodesEnabled : True
        LongAddressesEnabled : False
        OrarEnabled : False
        SuppressXAnonymousTls : False
        AdvertiseClientSettings : False
        Fqdn : mail.margarineindustries.com
        Comment :
        Enabled : False
        ConnectionTimeout : 00:05:00
        ConnectionInactivityTimeout : 00:01:00
        MessageRateLimit : 600
        MessageRateSource : IPAddress
        MaxInboundConnection : 5000
        MaxInboundConnectionPerSource : 20
        MaxInboundConnectionPercentagePerSource : 2
        MaxHeaderSize : 64 KB (65,536 bytes)
        MaxHopCount : 60
        MaxLocalHopCount : 12
        MaxLogonFailures : 3
        MaxMessageSize : 10 MB (10,485,760 bytes)
        MaxProtocolErrors : 5
        MaxRecipientsPerMessage : 200
        PermissionGroups : ExchangeServers, Partners
        PipeliningEnabled : True
        ProtocolLoggingLevel : None
        RemoteIPRanges : {0.0.0.0-255.255.255.255}
        RequireEHLODomain : False
        RequireTLS : False
        EnableAuthGSSAPI : False
        ExtendedProtectionPolicy : None
        LiveCredentialEnabled : False
        TlsDomainCapabilities : {}
        Server : tmg
        SizeEnabled : Enabled
        TarpitInterval : 00:00:05
        MaxAcknowledgementDelay : 00:00:30
        AdminDisplayName :
        ExchangeVersion : 0.1 (8.0.535.0)
        Name : Default internal receive connector TMG
        DistinguishedName : CN=Default internal receive connector TMG,CN=SMTP Receive Connectors,CN=Proto
        cols,CN=tmg,CN=Servers,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=
        Administrative Groups,CN=First Organization,CN=Microsoft Exchange,CN=Services
        ,CN=Configuration,CN={2AE6E842-2155-4072-9919-6B7F6D9105C2}
        Identity : tmg\Default internal receive connector TMG
        Guid : 6c174de4-ea3b-42a4-ac30-ce50d19fc303
        ObjectCategory : CN=ms-Exch-Smtp-Receive-Connector,CN=Schema,CN=Configuration,CN={2AE6E842-215
        5-4072-9919-6B7F6D9105C2}
        ObjectClass : {top, msExchSmtpReceiveConnector}
        WhenChanged : 26-Jan-13 11:43:55 AM
        WhenCreated : 12-Sep-12 11:18:41 AM
        WhenChangedUTC : 26-Jan-13 7:43:55 AM
        WhenCreatedUTC : 12-Sep-12 7:18:41 AM
        OrganizationId :
        OriginatingServer : localhost
        IsValid : True

        AuthMechanism : Tls, ExternalAuthoritative
        Banner :
        BinaryMimeEnabled : True
        Bindings : {192.168.240.5:25}
        ChunkingEnabled : True
        DefaultDomain :
        DeliveryStatusNotificationEnabled : True
        EightBitMimeEnabled : True
        BareLinefeedRejectionEnabled : False
        DomainSecureEnabled : False
        EnhancedStatusCodesEnabled : True
        LongAddressesEnabled : False
        OrarEnabled : False
        SuppressXAnonymousTls : False
        AdvertiseClientSettings : False
        Fqdn : mail.margarineindustries.com
        Comment :
        Enabled : False
        ConnectionTimeout : 00:05:00
        ConnectionInactivityTimeout : 00:01:00
        MessageRateLimit : 600
        MessageRateSource : IPAddress
        MaxInboundConnection : 5000
        MaxInboundConnectionPerSource : 20
        MaxInboundConnectionPercentagePerSource : 2
        MaxHeaderSize : 64 KB (65,536 bytes)
        MaxHopCount : 60
        MaxLocalHopCount : 12
        MaxLogonFailures : 3
        MaxMessageSize : 10 MB (10,485,760 bytes)
        MaxProtocolErrors : 5
        MaxRecipientsPerMessage : 200
        PermissionGroups : AnonymousUsers, ExchangeServers, Partners
        PipeliningEnabled : True
        ProtocolLoggingLevel : None
        RemoteIPRanges : {0.0.0.0-255.255.255.255}
        RequireEHLODomain : False
        RequireTLS : False
        EnableAuthGSSAPI : False
        ExtendedProtectionPolicy : None
        LiveCredentialEnabled : False
        TlsDomainCapabilities : {}
        Server : tmg
        SizeEnabled : Enabled
        TarpitInterval : 00:00:05
        MaxAcknowledgementDelay : 00:00:30
        AdminDisplayName :
        ExchangeVersion : 0.1 (8.0.535.0)
        Name : Internet
        DistinguishedName : CN=Internet,CN=SMTP Receive Connectors,CN=Protocols,CN=tmg,CN=Servers,CN=Exch
        ange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=First
        Organization,CN=Microsoft Exchange,CN=Services,CN=Configuration,CN={2AE6E842
        -2155-4072-9919-6B7F6D9105C2}
        Identity : tmg\Internet
        Guid : 419858ae-6976-4fec-9533-2eb40e19e6a7
        ObjectCategory : CN=ms-Exch-Smtp-Receive-Connector,CN=Schema,CN=Configuration,CN={2AE6E842-215
        5-4072-9919-6B7F6D9105C2}
        ObjectClass : {top, msExchSmtpReceiveConnector}
        WhenChanged : 29-Jan-13 8:43:01 AM
        WhenCreated : 26-Jan-13 11:14:00 AM
        WhenChangedUTC : 29-Jan-13 4:43:01 AM
        WhenCreatedUTC : 26-Jan-13 7:14:00 AM
        OrganizationId :
        OriginatingServer : localhost
        IsValid : True

      • Your Edge Default Internal Receive Connector is set to communicate with the entire world (0.0.0.0-255.255.255.255). As far as I am aware, this should be restricted to your CAS server IP Address only.

        Did you kill inbound mail too? Can’t seem to communicate with your server.

        Alan

  11. Hi Alan,
    This is for the CAS.

    RunspaceId : 585200e4-b144-40bc-98c4-562098510bd1
    AuthMechanism : Tls, Integrated, BasicAuth, BasicAuthRequireTLS, ExchangeServer
    Banner :
    BinaryMimeEnabled : True
    Bindings : {:::25, 0.0.0.0:25}
    ChunkingEnabled : True
    DefaultDomain :
    DeliveryStatusNotificationEnabled : True
    EightBitMimeEnabled : True
    BareLinefeedRejectionEnabled : False
    DomainSecureEnabled : False
    EnhancedStatusCodesEnabled : True
    LongAddressesEnabled : False
    OrarEnabled : False
    SuppressXAnonymousTls : False
    AdvertiseClientSettings : False
    Fqdn : mail.margarineindustries.com
    Comment :
    Enabled : True
    ConnectionTimeout : 00:10:00
    ConnectionInactivityTimeout : 00:05:00
    MessageRateLimit : unlimited
    MessageRateSource : IPAddress
    MaxInboundConnection : 5000
    MaxInboundConnectionPerSource : unlimited
    MaxInboundConnectionPercentagePerSource : 100
    MaxHeaderSize : 64 KB (65,536 bytes)
    MaxHopCount : 60
    MaxLocalHopCount : 12
    MaxLogonFailures : 3
    MaxMessageSize : 10 MB (10,485,760 bytes)
    MaxProtocolErrors : 5
    MaxRecipientsPerMessage : 5000
    PermissionGroups : ExchangeUsers, ExchangeServers, ExchangeLegacyServers
    PipeliningEnabled : True
    ProtocolLoggingLevel : None
    RemoteIPRanges : {::-ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff, 0.0.0.0-255.255.255.255}
    RequireEHLODomain : False
    RequireTLS : False
    EnableAuthGSSAPI : False
    ExtendedProtectionPolicy : None
    LiveCredentialEnabled : False
    TlsDomainCapabilities : {}
    Server : MAIL
    SizeEnabled : EnabledWithoutValue
    TarpitInterval : 00:00:05
    MaxAcknowledgementDelay : 00:00:30
    AdminDisplayName :
    ExchangeVersion : 0.1 (8.0.535.0)
    Name : Default MAIL
    DistinguishedName : CN=Default MAIL,CN=SMTP Receive Connectors,CN=Protocols,CN=MAIL,CN=Servers,CN
    =Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=
    MailMargarine,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=margarine
    industries,DC=com
    Identity : MAIL\Default MAIL
    Guid : bc571bbc-6357-446a-9c7a-8b54d9b732d7
    ObjectCategory : margarineindustries.com/Configuration/Schema/ms-Exch-Smtp-Receive-Connector
    ObjectClass : {top, msExchSmtpReceiveConnector}
    WhenChanged : 01-Nov-12 10:13:53 PM
    WhenCreated : 10-Jul-12 11:47:07 AM
    WhenChangedUTC : 01-Nov-12 6:13:53 PM
    WhenCreatedUTC : 10-Jul-12 7:47:07 AM
    OrganizationId :
    OriginatingServer : milnts.margarineindustries.com
    IsValid : True

    RunspaceId : 585200e4-b144-40bc-98c4-562098510bd1
    AuthMechanism : Tls
    Banner :
    BinaryMimeEnabled : True
    Bindings : {:::587, 0.0.0.0:587}
    ChunkingEnabled : True
    DefaultDomain :
    DeliveryStatusNotificationEnabled : True
    EightBitMimeEnabled : True
    BareLinefeedRejectionEnabled : False
    DomainSecureEnabled : False
    EnhancedStatusCodesEnabled : True
    LongAddressesEnabled : False
    OrarEnabled : False
    SuppressXAnonymousTls : False
    AdvertiseClientSettings : False
    Fqdn : mail.margarineindustries.com
    Comment :
    Enabled : True
    ConnectionTimeout : 00:10:00
    ConnectionInactivityTimeout : 00:05:00
    MessageRateLimit : 5
    MessageRateSource : User
    MaxInboundConnection : 5000
    MaxInboundConnectionPerSource : 20
    MaxInboundConnectionPercentagePerSource : 2
    MaxHeaderSize : 64 KB (65,536 bytes)
    MaxHopCount : 60
    MaxLocalHopCount : 12
    MaxLogonFailures : 3
    MaxMessageSize : 10 MB (10,485,760 bytes)
    MaxProtocolErrors : 5
    MaxRecipientsPerMessage : 200
    PermissionGroups : ExchangeUsers, ExchangeServers
    PipeliningEnabled : True
    ProtocolLoggingLevel : None
    RemoteIPRanges : {::-ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff, 0.0.0.0-255.255.255.255}
    RequireEHLODomain : False
    RequireTLS : False
    EnableAuthGSSAPI : True
    ExtendedProtectionPolicy : None
    LiveCredentialEnabled : False
    TlsDomainCapabilities : {}
    Server : MAIL
    SizeEnabled : Enabled
    TarpitInterval : 00:00:05
    MaxAcknowledgementDelay : 00:00:30
    AdminDisplayName :
    ExchangeVersion : 0.1 (8.0.535.0)
    Name : Client MAIL
    DistinguishedName : CN=Client MAIL,CN=SMTP Receive Connectors,CN=Protocols,CN=MAIL,CN=Servers,CN=
    Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=M
    ailMargarine,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=margarinei
    ndustries,DC=com
    Identity : MAIL\Client MAIL
    Guid : 2604fb25-2f4c-4afe-a8ff-5335826402df
    ObjectCategory : margarineindustries.com/Configuration/Schema/ms-Exch-Smtp-Receive-Connector
    ObjectClass : {top, msExchSmtpReceiveConnector}
    WhenChanged : 25-Jan-13 10:50:31 AM
    WhenCreated : 10-Jul-12 11:47:07 AM
    WhenChangedUTC : 25-Jan-13 6:50:31 AM
    WhenCreatedUTC : 10-Jul-12 7:47:07 AM
    OrganizationId :
    OriginatingServer : milnts.margarineindustries.com
    IsValid : True

    RunspaceId : 585200e4-b144-40bc-98c4-562098510bd1
    AuthMechanism : Tls, Integrated, BasicAuth, BasicAuthRequireTLS, ExchangeServer
    Banner :
    BinaryMimeEnabled : True
    Bindings : {:::25, 0.0.0.0:25}
    ChunkingEnabled : True
    DefaultDomain :
    DeliveryStatusNotificationEnabled : True
    EightBitMimeEnabled : True
    BareLinefeedRejectionEnabled : False
    DomainSecureEnabled : False
    EnhancedStatusCodesEnabled : True
    LongAddressesEnabled : False
    OrarEnabled : False
    SuppressXAnonymousTls : False
    AdvertiseClientSettings : False
    Fqdn : testsvr.margarineindustries.com
    Comment :
    Enabled : True
    ConnectionTimeout : 00:10:00
    ConnectionInactivityTimeout : 00:05:00
    MessageRateLimit : unlimited
    MessageRateSource : IPAddress
    MaxInboundConnection : 5000
    MaxInboundConnectionPerSource : unlimited
    MaxInboundConnectionPercentagePerSource : 100
    MaxHeaderSize : 64 KB (65,536 bytes)
    MaxHopCount : 60
    MaxLocalHopCount : 12
    MaxLogonFailures : 3
    MaxMessageSize : 10 MB (10,485,760 bytes)
    MaxProtocolErrors : 5
    MaxRecipientsPerMessage : 5000
    PermissionGroups : ExchangeUsers, ExchangeServers, ExchangeLegacyServers
    PipeliningEnabled : True
    ProtocolLoggingLevel : None
    RemoteIPRanges : {::-ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff, 0.0.0.0-255.255.255.255}
    RequireEHLODomain : False
    RequireTLS : False
    EnableAuthGSSAPI : False
    ExtendedProtectionPolicy : None
    LiveCredentialEnabled : False
    TlsDomainCapabilities : {}
    Server : TESTSVR
    SizeEnabled : EnabledWithoutValue
    TarpitInterval : 00:00:05
    MaxAcknowledgementDelay : 00:00:30
    AdminDisplayName :
    ExchangeVersion : 0.1 (8.0.535.0)
    Name : Default TESTSVR
    DistinguishedName : CN=Default TESTSVR,CN=SMTP Receive Connectors,CN=Protocols,CN=TESTSVR,CN=Serv
    ers,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Grou
    ps,CN=MailMargarine,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=mar
    garineindustries,DC=com
    Identity : TESTSVR\Default TESTSVR
    Guid : 68c4307a-ec8f-4c2c-a5ae-79f687255f14
    ObjectCategory : margarineindustries.com/Configuration/Schema/ms-Exch-Smtp-Receive-Connector
    ObjectClass : {top, msExchSmtpReceiveConnector}
    WhenChanged : 02-Oct-12 10:56:44 AM
    WhenCreated : 02-Oct-12 10:56:44 AM
    WhenChangedUTC : 02-Oct-12 6:56:44 AM
    WhenCreatedUTC : 02-Oct-12 6:56:44 AM
    OrganizationId :
    OriginatingServer : milnts.margarineindustries.com
    IsValid : True

    RunspaceId : 585200e4-b144-40bc-98c4-562098510bd1
    AuthMechanism : Tls, Integrated, BasicAuth, BasicAuthRequireTLS
    Banner :
    BinaryMimeEnabled : True
    Bindings : {:::587, 0.0.0.0:587}
    ChunkingEnabled : True
    DefaultDomain :
    DeliveryStatusNotificationEnabled : True
    EightBitMimeEnabled : True
    BareLinefeedRejectionEnabled : False
    DomainSecureEnabled : False
    EnhancedStatusCodesEnabled : True
    LongAddressesEnabled : False
    OrarEnabled : False
    SuppressXAnonymousTls : False
    AdvertiseClientSettings : False
    Fqdn : testsvr.margarineindustries.com
    Comment :
    Enabled : True
    ConnectionTimeout : 00:10:00
    ConnectionInactivityTimeout : 00:05:00
    MessageRateLimit : 5
    MessageRateSource : User
    MaxInboundConnection : 5000
    MaxInboundConnectionPerSource : 20
    MaxInboundConnectionPercentagePerSource : 2
    MaxHeaderSize : 64 KB (65,536 bytes)
    MaxHopCount : 60
    MaxLocalHopCount : 12
    MaxLogonFailures : 3
    MaxMessageSize : 10 MB (10,485,760 bytes)
    MaxProtocolErrors : 5
    MaxRecipientsPerMessage : 200
    PermissionGroups : AnonymousUsers, ExchangeUsers
    PipeliningEnabled : True
    ProtocolLoggingLevel : None
    RemoteIPRanges : {::-ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff, 0.0.0.0-255.255.255.255}
    RequireEHLODomain : False
    RequireTLS : False
    EnableAuthGSSAPI : True
    ExtendedProtectionPolicy : None
    LiveCredentialEnabled : False
    TlsDomainCapabilities : {}
    Server : TESTSVR
    SizeEnabled : Enabled
    TarpitInterval : 00:00:05
    MaxAcknowledgementDelay : 00:00:30
    AdminDisplayName :
    ExchangeVersion : 0.1 (8.0.535.0)
    Name : Client TESTSVR
    DistinguishedName : CN=Client TESTSVR,CN=SMTP Receive Connectors,CN=Protocols,CN=TESTSVR,CN=Serve
    rs,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Group
    s,CN=MailMargarine,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=marg
    arineindustries,DC=com
    Identity : TESTSVR\Client TESTSVR
    Guid : e7f73159-d3b2-4ebf-a0ee-e6736ec7660f
    ObjectCategory : margarineindustries.com/Configuration/Schema/ms-Exch-Smtp-Receive-Connector
    ObjectClass : {top, msExchSmtpReceiveConnector}
    WhenChanged : 01-Nov-12 8:20:40 PM
    WhenCreated : 02-Oct-12 10:56:44 AM
    WhenChangedUTC : 01-Nov-12 4:20:40 PM
    WhenCreatedUTC : 02-Oct-12 6:56:44 AM
    OrganizationId :
    OriginatingServer : milnts.margarineindustries.com
    IsValid : True

    • Hi Alan,
      Thank you for your valuable input. I have change the default Internal receive connector as you suggested. Yes I have disable receive connector as I was having issue with the relay server. I have enable it now and will keep you updated of the issue if it’s been resolved. Thank you very much for your valuable support.

      Mik

      • Hi Alan,
        I am still having issue with the relay problem.Can you advise me please.Thanks.
        Mik

  12. the final word :
    can i work with pop 3 without having many spams ???
    and i really need pop3 not anywhere , thankx

    • Spam is an issue that can be dealt with on an email client or an email server. If you collect mail via POP3, then you may need to look for some software that works on your computer that can filter spam or if you collect from an Email Server that you have access to, then there are very good products that can get rid of the spam so that it doesn’t even reach your mailbox.

  13. […] Receive Connector and still close open relay (Alan Hardisty has instructions on his blog here: https://alanhardisty.wordpress.com/2010/07/12/how-to-close-an-open-relay-in-exchange-2007-2010/ ) but in general, there is no reason to enable Externally Secured Authentication on a publicly […]

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